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-- Create the function
___ ___ SumRideHrsDateRange (___ ___, ___ ___)
-- Specify return data type
RETURNS ___
AS
BEGIN
RETURN
-- Sum the difference between StartDate and EndDate
(___ ___(___(second, StartDate, EndDate))/3600
FROM CapitalBikeShare
-- Include only the relevant transactions
WHERE StartDate > ___ and StartDate < ___)
END